Printing-frame.



No. 7|2,295. Patented 0st. 28, |902.

F. J. S. GILBERT.

PRINTING FRAME.

Appliution Med June 14, X902.)

(No Model.)

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UNITED STATES PATENT OFFICE.

FREDERICK JAMES SIMPSON GILBERT, OF NEV ORLEANS, LOUISIANA.

PRINTING-FRAM E.

SPECIFICATION forming part of Letters Patent No. 712,295, dated October28, 1902.

Application filed June 14,1902.

To 0M zzz/tom it may] concern.-

Beit known that I, FREDERICK JAMES SIMP- soN GILBERT, a subject of theKing of Great Britain, and a resident of New Orleans, in the parish ofOrleans and State of Louisiana, haveinventedanewandImprovedPrinting-Frame, of which the following is a full,clear, and eX- act description.

My invention relates to printing-frames of the kind used in photographyand the arts allied thereto.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in both the figures.

Figure 1 is a plan view, partly in section, showing my invention asapplied to an ordinary photographic-printing frame, and Fig. 2 is anenlarged section upon the line 2 2 of' Fig. 1 looking in the directionof the arrows and showing the film and sensitive paper in place.

A wooden rectangular frame consisting of the members 1 2 3 at isprovided with a window or glass plate 5 and with clamp-holes 6 7. Aremovable back 8 fits into this frame in the usual manner. Upon theglass plate or window 5 a film 9 is placed, and upon this film, parallelwith and adjacent to two of the edges thereof,are longitudinal wires 10.One end of each wire is wrapped upon a revoluble pin 11, which isprovided with a milled head 12 for the purpose of being engaged by thefinger. The member l is provided with apertures 13, in which the coilsof the wires 10 are wound. The other end of each wire is provided with aknot 14, which engages the aperture 15 in the member 3 of the frame. Asheet of sensitive paper 16 is placed over the film, one edge of thissensitive paper overlapping the wire 10.

It should be remembered that the films ordinarily used in photographyare generally stiff and liable to curl and twist, sometimes wit-hout anyapparent cause. In the ordinary printing-frame when the film is placedupon the window or glass plate and the sensitive paper is in turn placedupon the film it is frequently desirable to remove the back plate of theframe and look at the edge of the sensitive paper. In doing this thefilm tends to santini. 111,714.' (Nomaden curl and the photographerfrequently has difiiculty in forcing the edge of the film back to itsnormal position. NVith my device, however, these difficulties areovercome. I merely loosen the revoluble pins 11 by means of the milledheads 12, thereby slackening the wires 10 to a slight degree. I nextinsert the film into the frame, so that two opposite edges are engagedby the wires 10, and then tighten the wires by means of the pins 11 andheads 12. I next place the sensitive paper over the film, andconsequently let two of the edges of the sensitive paper slightlyoverlap the wires. This slight overlapping does not affect the printingof the image upon the sensitive paper for the reason that a littlemargin is always allowed-that is to say, a space immediately adjacent tothe border of the sensitive paper is not used for printing, and a spaceimmediately adjacent to the border of the film or negative is not usedfor the purpose. If now the back plate 8 be placed in position, theprinting may be proceeded with in the usual manner, and the edges of thesensitive paper may be examined at intervals by the photographer withoutany danger of the film giving trouble of the kind above described. It issimply held down at the two opposite edges by the wires 10, as aboveexplained.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A printing-frame, comprising a hollow casingprovided with a window for receiving the film to be copied, and with alongitudinal extensible member for engaging said lm adjacent to one ofthe edges thereof, and a removable back for securing sensitive paperupon said film and said longitudinal member.

2.1A printing-frame, comprising a hollow casing provided with a windowfor receiving a film to be copied, and also provided with a longitudinalflexible member for engaging one of the edges of said film, saidflexible member being free to hold said edge of said film against saidwindow, and a removable back for holding sensitive paper against saidfilm and said longitudinal exible member.

3. A printing-frame, comprising a hollow casing provided with a windowfor receiv -casing provided with a window for receiving a film to becopied, a longitudinal wire stretched across said casing internally, andfree to engage said film adjacent to one of the edges thereof, meanscontrollable at will for tensioning said wire, and a removable back forholding sensitive paper upon said film and said wire.

6. A printing-frame, comprising a hollow casing provided with a windowfor receiving a film to be copied, a longitudinal wire stretched acrosssaid casing internally and free to engage said film adjacent to one ofthe edges thereof, an adjustable friction device for tensioning saidwire, and a removable back for holding sensitive paper upon said filmand said Wire.

In testimony whereof I have signed my name to this specification in thepresence of ytwo subscribing witnesses.

FREDERICK JAMES SIMPSON GILBERT.

Witnesses:

EDGAR GRIMs, W. A. KESINGHAM.

